对javabean的内省操作

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.PropertyUtils;

public class IntroSpectorTest {

/**
* @param args
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
ReflectPoint pt1 = new ReflectPoint(3,5);

String propertyName = "x";
//"x"-->"X"-->"getX"-->MethodGetX-->
Object retVal = getProperty(pt1, propertyName);
System.out.println(retVal);

Object value = 7;

setProperties(pt1, propertyName, value);

System.out.println(BeanUtils.getProperty(pt1, "x").getClass().getName());
BeanUtils.setProperty(pt1, "x", "9");
System.out.println(pt1.getX());
/*
//java7的新特性
Map map = {name:"zxx",age:18};
BeanUtils.setProperty(map, "name", "lhm");
*/
BeanUtils.setProperty(pt1, "birthday.time", "111");
System.out.println(BeanUtils.getProperty(pt1, "birthday.time"));

PropertyUtils.setProperty(pt1, "x", 9);
System.out.println(PropertyUtils.getProperty(pt1, "x").getClass().getName());

}

private static void setProperties(Object pt1, String propertyName,
Object value) throws IntrospectionException,
IllegalAccessException, InvocationTargetException {
PropertyDescriptor pd2 = new PropertyDescriptor(propertyName,pt1.getClass());
Method methodSetX = pd2.getWriteMethod();
methodSetX.invoke(pt1,value);
}

private static Object getProperty(Object pt1, String propertyName)
throws IntrospectionException, IllegalAccessException,
InvocationTargetException {
/*PropertyDescriptor pd = new PropertyDescriptor(propertyName,pt1.getClass());
Method methodGetX = pd.getReadMethod();
Object retVal = methodGetX.invoke(pt1);*/

BeanInfo beanInfo = Introspector.getBeanInfo(pt1.getClass());
PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();
Object retVal = null;
for(PropertyDescriptor pd : pds){
if(pd.getName().equals(propertyName))
{
Method methodGetX = pd.getReadMethod();
retVal = methodGetX.invoke(pt1);
break;
}
}
return retVal;
}

}